Synology RackStation RS2421+ is made for a variety of high-performance server roles such as backup, file storage, email servers, and domain controllers; sliding rail kit is included for easy server installation Ryzen V1500B 4-Core 2.2GHz CPU; 32GB DDR4 ECC SODIMM Memory; 48TB (12 x 4TB) SATA 2.5' SSDs for Ultra-Fast Storage; 4 x RJ-45 1GbE LAN Ports (with Link Aggregation / Failover support); 2 x USB 3.2 Ports; 1 x Expansion Port; Btrfs File System for Advanced LUN iSCSI Service Features: Virtual Machine Manager, Synology Office, Central Management System, Security Advisor, Hyper Backup, Snapshot Replication, Active Backup for VMware, Office, and Windows, Synology Drive, Chat, Surveillance Station, Collaboration Suite, and many more Synology NAS chassis comes in a sealed box. Hard drives and memory upgrades included separately, NOT installed, installation required.